Question

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Answer 1

Lets use the process of elimination for this question

Answer 2

Looking at 4/8, is it possible for that fraction to have a denominator of 12, or 24, or 36 or 72?

Answer 3

LCD means the least common denominator.
That means the smallest number (except zero) that is a multiple of both denominators.

To find multiples of a number, multiply the number by 0, 1, 2, 3, 4, 5, ...

Here are multiples of 8: 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, ...
Here are multiples of 12: 0, 12, 24, 36, 48, 60, 72, 84, 96, ...

The common multiples you see above are: 0, 24, 48, 72
The smallest multiple in common (except for 0) is: ?

Answer 4

24

Answer 5

So it's 24?
Thanks!

Answer 6

Correct.

Answer 7

Since you have choices, you can also look at the choices and see which choices are divisible by both 8 and 12.
Of the four choices, only 24 and 72 are divisible by both 8 and 12.
Since 24 is the smaller of the two numbers, the answer must be 24.